<template>
    <div class="calendar">
        <div class="calendar-tools">
            <span class="calendar-prev" @click="prev">
                <svg width="20" height="20" viewBox="0 0 16 16" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
                <g class="transform-group">
                    <g transform="scale(0.015625, 0.015625)">
                        <path d="M671.968 912c-12.288 0-24.576-4.672-33.952-14.048L286.048 545.984c-18.752-18.72-18.752-49.12 0-67.872l351.968-352c18.752-18.752 49.12-18.752 67.872 0 18.752 18.72 18.752 49.12 0 67.872l-318.016 318.048 318.016 318.016c18.752 18.752 18.752 49.12 0 67.872C696.544 907.328 684.256 912 671.968 912z" fill="#5e7a88"></path>
                    </g>
                </g>
                </svg>
            </span>
            <span class="calendar-next"  @click="next">
                <svg width="20" height="20" viewBox="0 0 16 16" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
                <g class="transform-group">
                    <g transform="scale(0.015625, 0.015625)">
                        <path d="M761.056 532.128c0.512-0.992 1.344-1.824 1.792-2.848 8.8-18.304 5.92-40.704-9.664-55.424L399.936 139.744c-19.264-18.208-49.632-17.344-67.872 1.888-18.208 19.264-17.376 49.632 1.888 67.872l316.96 299.84-315.712 304.288c-19.072 18.4-19.648 48.768-1.248 67.872 9.408 9.792 21.984 14.688 34.56 14.688 12 0 24-4.48 33.312-13.44l350.048-337.376c0.672-0.672 0.928-1.6 1.6-2.304 0.512-0.48 1.056-0.832 1.568-1.344C757.76 538.88 759.2 535.392 761.056 532.128z" fill="#5e7a88"></path>
                    </g>
                </g>
                </svg>
            </span>
            <div class="calendar-info" @click.stop="changeYear">
                <!-- {{monthString}} -->
                <div class="month">
                    <div class="month-inner" :style="{'top':-(this.month*20)+'px'}">
                        <span v-for="m in months">{{m}}</span>
                    </div>
                </div>
                <div class="year">{{year}}</div>
            </div>
        </div>
        <table cellpadding="5">
        <thead>
            <tr>
                <td v-for="week in weeks" class="week">{{week}}</td>
            </tr>
        </thead>
        <tbody>
        <tr v-for="(day,k1) in days" style="{'animation-delay',(k1*30)+'ms'}">
            <td v-for="(child,k2) in day" :class="{'selected':child.selected,'disabled':child.disabled}" @click="select(k1,k2,$event)">
                <span :class="{'red':k2===0||k2===6||((child.isLunarFestival||child.isGregorianFestival) && lunar)}">{{child.day}}</span>
                <div class="text" v-if="child.eventName!==undefined">{{child.eventName}}</div>
                <div class="text" :class="{'isLunarFestival':child.isLunarFestival,'isGregorianFestival':child.isGregorianFestival}" v-if="lunar">{{child.lunar}}</div>
            </td>
        </tr>
        </tbody>
        </table>

        <div class="calendar-years" :class="{'show':yearsShow}">
            <span v-for="y in years" @click.stop="selectYear(y)" :class="{'active':y===year}">{{y}}</span>
        </div>
 
    </div>
</template>

<script>
import calendar from 'hdc/calendar';
export default {
  props: {
    value: {
      type: Array,
      default: function() {
        return [];
      }
    },
    begin: {
      type: Array,
      default: function() {
        return [];
      }
    },
    end: {
      type: Array,
      default: function() {
        return [];
      }
    },
    range: {
      type: Boolean,
      default: false
    },
    zero: {
      type: Boolean,
      default: false
    },
    lunar: {
      type: Boolean,
      default: false
    },
    weeks: {
      type: Array,
      default: function() {
        return window.navigator.language.toLowerCase() === 'zh-cn'
          ? ['日', '一', '二', '三', '四', '五', '六']
          : ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
      }
    },
    months: {
      type: Array,
      default: function() {
        return window.navigator.language.toLowerCase() === 'zh-cn'
        ? ['一月', '二月', '三月', '四月', '五月', '六月', '七月', '八月', '九月', '十月', '十一月', '十二月'] : ['January',
          'February',
          'March',
          'April',
          'May',
          'June',
          'July',
          'August',
          'September',
          'October',
          'November',
          'December'
        ];
      }
    },
    events: {
      type: Object,
      default: function() {
        return {};
      }
    }
  },
  data() {
    return {
      years: [],
      yearsShow: false,
      year: 0,
      month: 0,
      day: 0,
      days: [],
      today: [],
      festival: {
        lunar: {
          '1-1': '春节',
          '1-15': '元宵节',
          '2-2': '龙头节',
          '5-5': '端午节',
          '7-7': '七夕节',
          '7-15': '中元节',
          '8-15': '中秋节',
          '9-9': '重阳节',
          '10-1': '寒衣节',
          '10-15': '下元节',
          '12-8': '腊八节',
          '12-23': '祭灶节'
        },
        gregorian: {
          '1-1': '元旦',
          '2-14': '情人节',
          '3-8': '妇女节',
          '3-12': '植树节',
          '4-5': '清明节',
          '5-1': '劳动节',
          '5-4': '青年节',
          '6-1': '儿童节',
          '7-1': '建党节',
          '8-1': '建军节',
          '9-10': '教师节',
          '10-1': '国庆节',
          '12-24': '平安夜',
          '12-25': '圣诞节'
        }
      },
      rangeBegin: [],
      rangeEnd: []
    };
  },
  watch: {
    events() {
      this.render(this.year, this.month);
    }
  },
  mounted() {
    this.init();
  },
  methods: {
    // 初始化一些东西
    init() {
      let now = new Date();
      // 没有默认值
      this.year = now.getFullYear();
      this.month = now.getMonth();
      this.day = now.getDate();
      if (this.value.length > 0) {
        if (this.range) {
          this.year = parseInt(this.value[0][0]);
          this.month = parseInt(this.value[0][1]) - 1;
          this.day = parseInt(this.value[0][2]);
          let year2 = parseInt(this.value[1][0]);
          let month2 = parseInt(this.value[1][1]) - 1;
          let day2 = parseInt(this.value[1][2]);
          this.rangeBegin = [this.year, this.month, this.day];
          this.rangeEnd = [year2, month2, day2];
          // console.log(this.month,this.rangeBegin,this.rangeEnd)
        } else {
          this.year = parseInt(this.value[0]);
          this.month = parseInt(this.value[1]) - 1;
          this.day = parseInt(this.value[2]);
        }
      }
      this.render(this.year, this.month);
    },
    // 渲染日期
    render(y, m) {
      let firstDayOfMonth = new Date(y, m, 1).getDay(); // 当月第一天
      let lastDateOfMonth = new Date(y, m + 1, 0).getDate(); // 当月最后一天
      let lastDayOfLastMonth = new Date(y, m, 0).getDate(); // 最后一月的最后一天
      this.year = y;
      let seletSplit = this.value;
      let i;
      let line = 0;
      let temp = [];
      let nextMonthPushDays = 1;
      for (i = 1; i <= lastDateOfMonth; i++) {
        let day = new Date(y, m, i).getDay(); // 返回星期几（0～6）
        let k;
        // 第一行
        if (day === 0) {
          temp[line] = [];
        } else if (i === 1) {
          temp[line] = [];
          k = lastDayOfLastMonth - firstDayOfMonth + 1;
          for (let j = 0; j < firstDayOfMonth; j++) {
            // console.log('第一行',lunarYear,lunarMonth,lunarValue,lunarInfo)
            temp[line].push(
              Object.assign(
                { day: k, disabled: true },
                this.getLunarInfo(
                  this.computedPrevYear(),
                  this.computedPrevMonth(true),
                  k
                ),
                this.getEvents(
                  this.computedPrevYear(),
                  this.computedPrevMonth(true),
                  k
                )
              )
            );
            k++;
          }
        }

        // 范围
        if (this.range) {
          // console.log('日期范围',this.getLunarInfo(this.year,this.month+1,i))
          let options = Object.assign(
            { day: i },
            this.getLunarInfo(this.year, this.month + 1, i),
            this.getEvents(this.year, this.month + 1, i)
          );
          if (this.rangeBegin.length > 0) {
            let beginTime = Number(
              new Date(
                this.rangeBegin[0],
                this.rangeBegin[1],
                this.rangeBegin[2]
              )
            );
            let endTime = Number(
              new Date(this.rangeEnd[0], this.rangeEnd[1], this.rangeEnd[2])
            );
            let stepTime = Number(new Date(this.year, this.month, i));
            if (beginTime <= stepTime && endTime >= stepTime) {
              options.selected = true;
            }
          }
          if (this.begin.length > 0) {
            let beginTime = Number(
              new Date(
                parseInt(this.begin[0]),
                parseInt(this.begin[1]) - 1,
                parseInt(this.begin[2])
              )
            );
            if (beginTime > Number(new Date(this.year, this.month, i))) {
              options.disabled = true;
            }
          }
          if (this.end.length > 0) {
            let endTime = Number(
              new Date(
                parseInt(this.end[0]),
                parseInt(this.end[1]) - 1,
                parseInt(this.end[2])
              )
            );
            if (endTime < Number(new Date(this.year, this.month, i))) {
              options.disabled = true;
            }
          }
          temp[line].push(options);
        } else {
          // console.log(this.lunar(this.year,this.month,i));
          // 单选模式
          let chk = new Date();
          let chkY = chk.getFullYear();
          let chkM = chk.getMonth();
          // 匹配上次选中的日期
          if (
            parseInt(seletSplit[0]) === this.year &&
            parseInt(seletSplit[1]) - 1 === this.month &&
            parseInt(seletSplit[2]) === i
          ) {
            // console.log('匹配上次选中的日期',lunarYear,lunarMonth,lunarValue,lunarInfo)
            temp[line].push(
              Object.assign(
                { day: i, selected: true },
                this.getLunarInfo(this.year, this.month + 1, i),
                this.getEvents(this.year, this.month + 1, i)
              )
            );
            this.today = [line, temp[line].length - 1];
          } else if (
            chkY === this.year &&
            chkM === this.month &&
            i === this.day &&
            this.value === ''
          ) {
            // 没有默认值的时候显示选中今天日期
            // console.log('今天',lunarYear,lunarMonth,lunarValue,lunarInfo)
            temp[line].push(
              Object.assign(
                { day: i, selected: true },
                this.getLunarInfo(this.year, this.month + 1, i),
                this.getEvents(this.year, this.month + 1, i)
              )
            );
            this.today = [line, temp[line].length - 1];
          } else {
            // 普通日期
            // console.log('设置可选范围',i,lunarYear,lunarMonth,lunarValue,lunarInfo)
            let options = Object.assign(
              { day: i, selected: false },
              this.getLunarInfo(this.year, this.month + 1, i),
              this.getEvents(this.year, this.month + 1, i)
            );
            if (this.begin.length > 0) {
              let beginTime = Number(
                new Date(
                  parseInt(this.begin[0]),
                  parseInt(this.begin[1]) - 1,
                  parseInt(this.begin[2])
                )
              );
              if (beginTime > Number(new Date(this.year, this.month, i))) {
                options.disabled = true;
              }
            }
            if (this.end.length > 0) {
              let endTime = Number(
                new Date(
                  parseInt(this.end[0]),
                  parseInt(this.end[1]) - 1,
                  parseInt(this.end[2])
                )
              );
              if (endTime < Number(new Date(this.year, this.month, i))) {
                options.disabled = true;
              }
            }
            temp[line].push(options);
          }
        }
        // 到周六换行
        if (day === 6 && i < lastDateOfMonth) {
          line++;
        } else if (i === lastDateOfMonth) {
          // line++
          let k = 1;
          for (let d = day; d < 6; d++) {
            // console.log(this.computedNextYear()+'-'+this.computedNextMonth(true)+'-'+k)
            temp[line].push(
              Object.assign(
                { day: k, disabled: true },
                this.getLunarInfo(
                  this.computedNextYear(),
                  this.computedNextMonth(true),
                  k
                ),
                this.getEvents(
                  this.computedNextYear(),
                  this.computedNextMonth(true),
                  k
                )
              )
            );
            k++;
          }
          // 下个月除了补充的前几天开始的日期
          nextMonthPushDays = k;
        }
      } // end for
      // console.log(this.year+'/'+this.month+'/'+this.day+':'+line)
      // 补充第六行让视觉稳定
      if (line <= 5 && nextMonthPushDays > 0) {
        // console.log({nextMonthPushDays:nextMonthPushDays,line:line})
        for (let i = line + 1; i <= 5; i++) {
          temp[i] = [];
          let start = nextMonthPushDays + (i - line - 1) * 7;
          for (let d = start; d <= start + 6; d++) {
            temp[i].push(
              Object.assign(
                { day: d, disabled: true },
                this.getLunarInfo(
                  this.computedNextYear(),
                  this.computedNextMonth(true),
                  d
                ),
                this.getEvents(
                  this.computedNextYear(),
                  this.computedNextMonth(true),
                  d
                )
              )
            );
          }
        }
      }
      this.days = temp;
    },
    computedPrevYear() {
      let value = this.year;
      if (this.month - 1 < 0) {
        value--;
      }
      return value;
    },
    computedPrevMonth(isString) {
      let value = this.month;
      if (this.month - 1 < 0) {
        value = 11;
      } else {
        value--;
      }
      // 用于显示目的（一般月份是从0开始的）
      if (isString) {
        return value + 1;
      }
      return value;
    },
    computedNextYear() {
      let value = this.year;
      if (this.month + 1 > 11) {
        value++;
      }
      return value;
    },
    computedNextMonth(isString) {
      let value = this.month;
      if (this.month + 1 > 11) {
        value = 0;
      } else {
        value++;
      }
      // 用于显示目的（一般月份是从0开始的）
      if (isString) {
        return value + 1;
      }
      return value;
    },
    // 获取农历信息
    getLunarInfo(y, m, d) {
      let lunarInfo = calendar.solar2lunar(y, m, d);
      let lunarValue = lunarInfo.IDayCn;
      // console.log(lunarInfo)
      let isLunarFestival = false;
      let isGregorianFestival = false;
      if (
        this.festival.lunar[lunarInfo.lMonth + '-' + lunarInfo.lDay] !==
        undefined
      ) {
        lunarValue = this.festival.lunar[lunarInfo.lMonth + '-' + lunarInfo.lDay];
        isLunarFestival = true;
      } else if (this.festival.gregorian[m + '-' + d] !== undefined) {
        lunarValue = this.festival.gregorian[m + '-' + d];
        isGregorianFestival = true;
      }
      return {
        lunar: lunarValue,
        isLunarFestival: isLunarFestival,
        isGregorianFestival: isGregorianFestival
      };
    },
    // 获取自定义事件
    getEvents(y, m, d) {
      if (Object.keys(this.events).length === 0) return false;
      if (this.events[y + '-' + m + '-' + d] !== undefined) {
        return {
          eventName: this.events[y + '-' + m + '-' + d]
        };
      }
      return {};
    },
    // 上月
    prev(e) {
      e.stopPropagation();
      if (this.month === 0) {
        this.month = 11;
        this.year = parseInt(this.year) - 1;
      } else {
        this.month = parseInt(this.month) - 1;
      }
      this.render(this.year, this.month);
    },
    //  下月
    next(e) {
      e.stopPropagation();
      if (this.month === 11) {
        this.month = 0;
        this.year = parseInt(this.year) + 1;
      } else {
        this.month = parseInt(this.month) + 1;
      }
      this.render(this.year, this.month);
    },
    // 选中日期
    select(k1, k2, e) {
      if (e !== undefined) e.stopPropagation();
      // 日期范围
      if (this.range) {
        if (this.rangeBegin.length === 0 || this.rangeEndTemp !== 0) {
          this.rangeBegin = [this.year, this.month, this.days[k1][k2].day];
          this.rangeBeginTemp = this.rangeBegin;
          this.rangeEnd = [this.year, this.month, this.days[k1][k2].day];
          this.rangeEndTemp = 0;
        } else {
          this.rangeEnd = [this.year, this.month, this.days[k1][k2].day];
          this.rangeEndTemp = 1;
          // 判断结束日期小于开始日期则自动颠倒过来
          if (
            +new Date(this.rangeEnd[0], this.rangeEnd[1], this.rangeEnd[2]) <
            +new Date(
              this.rangeBegin[0],
              this.rangeBegin[1],
              this.rangeBegin[2]
            )
          ) {
            this.rangeBegin = this.rangeEnd;
            this.rangeEnd = this.rangeBeginTemp;
          }
          // 小于10左边打补丁
          let begin = [];
          let end = [];
          if (this.zero) {
            this.rangeBegin.forEach((v, k) => {
              if (k === 1) v = v + 1;
              begin.push(this.zeroPad(v));
            });
            this.rangeEnd.forEach((v, k) => {
              if (k === 1) v = v + 1;
              end.push(this.zeroPad(v));
            });
          } else {
            begin = this.rangeBegin;
            end = this.rangeEnd;
            begin[1]++;
            end[1]++;
          }
          // console.log('选中日期',begin,end)
          this.$emit('select', begin, end);
        }
        this.render(this.year, this.month);
      } else {
        // 取消上次选中
        if (this.today.length > 0) {
          this.days.forEach(v => {
            v.forEach(vv => {
              vv.selected = false;
            });
          });
        }
        // 设置当前选中天
        this.days[k1][k2].selected = true;
        this.day = this.days[k1][k2].day;
        this.today = [k1, k2];
        this.$emit('select', [
          this.year,
          this.zero ? this.zeroPad(this.month + 1) : this.month + 1,
          this.zero
            ? this.zeroPad(this.days[k1][k2].day)
            : this.days[k1][k2].day
        ]);
      }
    },
    changeYear() {
      if (this.yearsShow) {
        this.yearsShow = false;
        return false;
      }
      this.yearsShow = true;
      this.years = [];
      for (let i = ~~this.year - 10; i < ~~this.year + 10; i++) {
        this.years.push(i);
      }
    },
    selectYear(value) {
      this.yearsShow = false;
      this.year = value;
      this.render(this.year, this.month);
    },
    // 日期补零
    zeroPad(n) {
      return String(n < 10 ? '0' + n : n);
    }
  }
};
</script>

<style scoped>
.calendar {
  margin: auto;
  width: 100%;
  min-width: 300px;
  background: #fff;
  font-family: 'PingFang SC', 'Hiragino Sans GB', 'STHeiti', 'Microsoft YaHei',
    'WenQuanYi Micro Hei', sans-serif;
  user-select: none;
}
.calendar-tools {
  height: 40px;
  font-size: 20px;
  line-height: 40px;
  color: #5e7a88;
}
.calendar-tools span {
  cursor: pointer;
}
.calendar-prev {
  width: 14.28571429%;
  float: left;
  text-align: center;
}
.calendar-info {
  padding-top: 3px;
  font-size: 16px;
  line-height: 1.3;
  text-align: center;
}
.calendar-info > div.month {
  margin: auto;
  height: 20px;
  width: 100px;
  text-align: center;
  color: #5e7a88;
  overflow: hidden;
  position: relative;
}
.calendar-info > div.month .month-inner {
  position: absolute;
  left: 0;
  top: 0;
  height: 240px;
  transition: top 0.5s cubic-bezier(0.075, 0.82, 0.165, 1);
}
.calendar-info > div.month .month-inner > span {
  display: block;
  font-size: 14px;
  height: 20px;
  width: 100px;
  overflow: hidden;
  text-align: center;
}
.calendar-info > div.year {
  font-size: 10px;
  line-height: 1;
  color: #999;
}
.calendar-next {
  width: 14.28571429%;
  float: right;
  text-align: center;
}

.calendar table {
  clear: both;
  width: 100%;
  margin-bottom: 10px;
  border-collapse: collapse;
  color: #444444;
}
.calendar td {
  margin: 2px !important;
  padding: 0px 0;
  width: 14.28571429%;
  height: 44px;
  text-align: center;
  vertical-align: middle;
  font-size: 14px;
  line-height: 125%;
  cursor: pointer;
  position: relative;
  vertical-align: top;
}
.calendar td.week {
  font-size: 10px;
  pointer-events: none !important;
  cursor: default !important;
}
.calendar td.disabled {
  color: #ccc;
  pointer-events: none !important;
  cursor: default !important;
}
.calendar td.disabled div {
  color: #ccc;
}
.calendar td span {
  display: block;
  max-width: 40px;
  height: 26px;
  font-size: 16px;
  line-height: 26px;
  margin: 0px auto;
  border-radius: 20px;
}
.calendar td:not(.selected) span:not(.red):hover {
  background: #f3f8fa;
  color: #444;
}
.calendar td:not(.selected) span.red:hover {
  background: #f9efef;
}
.calendar td:not(.disabled) span.red {
  color: #ea6151;
}
.calendar td.selected span {
  background-color: #5e7a88;
  color: #fff;
}
.calendar td .text {
  position: absolute;
  top: 28px;
  left: 0;
  right: 0;
  text-align: center;

  padding: 2px;
  font-size: 8px;
  line-height: 1.2;
  color: #444;
}
.calendar td .isGregorianFestival,
.calendar td .isLunarFestival {
  color: #ea6151;
}
.calendar td.selected span.red {
  background-color: #ea6151;
  color: #fff;
}
.calendar td.selected span.red:hover {
  background-color: #ea6151;
  color: #fff;
}
.calendar thead td {
  text-transform: uppercase;
  height: 30px;
  vertical-align: middle;
}
.calendar-button {
  text-align: center;
}
.calendar-button span {
  cursor: pointer;
  display: inline-block;
  min-height: 1em;
  min-width: 5em;
  vertical-align: baseline;
  background: #5e7a88;
  color: #fff;
  margin: 0 0.25em 0 0;
  padding: 0.6em 2em;
  font-size: 1em;
  line-height: 1em;
  text-align: center;
  border-radius: 0.3em;
}
.calendar-button span.cancel {
  background: #efefef;
  color: #666;
}
.calendar-years {
  position: absolute;
  left: 0px;
  top: 60px;
  right: 0px;
  bottom: 0px;
  background: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  overflow: auto;
  transition: all 0.5s cubic-bezier(0.075, 0.82, 0.165, 1);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-10px);
}
.calendar-years.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0px);
}
.calendar-years > span {
  margin: 1px 5px;
  display: inline-block;
  width: 60px;
  line-height: 30px;
  border-radius: 20px;
  text-align: center;
  border: 1px solid #fbfbfb;
  color: #999;
}
.calendar-years > span.active {
  border: 1px solid #5e7a88;
  background-color: #5e7a88;
  color: #fff;
}
</style>